Xcode中：如何改变在影像（同一位置）触摸图片？

Question

简单地说，我已经在一个UIView放置的图像与所述界面生成器。现在我想运行时，我触摸该图像的方法/功能，例如，当另一图像应该被加载。

我的代码：

- (void)touchesended:(NSSet*) touches withEvent:(UIEvent *)event 
{
    // UITouch *touch = [touch anyObject];
    bild_1_1.image = [UIImage imageNamed:@"t_1_4.jpg"];
}

Answer 1

您需要您处理触摸事件的UIView。要做到这一点，你应该创建的UIView的子类，并添加的touchesBegan您实现：withEvent：方法方式，在这里最简单的例子：

//  TouchSimpleView.h
@interface TouchSimpleView : UIImageView {
    id  delegate;
}
@property(retain) id delegate;
@end

@interface NSObject(TouchSimpleView)
-(void)didTouchView:(UIView *)aView;
@end 

//  TouchSimpleView.m
#import "TouchSimpleView.h"
@implementation TouchSimpleView
@synthesize delegate;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"touchesBegan!!! ");
    if ( delegate != nil && [delegate respondsToSelector:@selector(didTouchView:)] ) {
        [delegate didTouchView:self];
    } 
    [super touchesBegan:touches withEvent:event];
}
@end

然后，可以当要处理的触摸，使用视图这个类的例如：

- (void)applicationDidFinishLaunching:(UIApplication *)application {    
    [window makeKeyAndVisible];
    touchView = [[TouchSimpleView alloc] initWithFrame:CGRectMake(50, 50, 200, 300)];
    touchView.delegate = self;
    [window addSubview:touchView];

    imageView =[[UIImageView alloc] initWithFrame:touchView.frame];
    imageView.image = [UIImage imageNamed:@"image1.png"];
    [touchView addSubview:imageView];
}

-(void)didTouchView:(UIView *)aView{
    NSLog(@"view touched, changing image");
    imageView.image = [UIImage imageNamed:@"image2.png"];
}

Answer 2

你想要什么可以放置的UIButton，而不是UIImage的使用方法了setBackgroundImage改变它的背景图片很容易做到：forState：在TouchUpInside事件处理程序

Answer 3

另一种解决方案：

在h文件

代替 IBOutlet中UIImagView *的ImageButton;

和

-(IBAction)doSomething:(id)sender;

在.m文件

-(IBAction)dosomething:(id)sender {

    // your code

   [imageButton setImage:[UIImage imageNamed:@""t_1_4.jpg"} forState:UIControlStateNormal];
}

工作在我的代码很细

Answer 4

这与我的工作，而无需创建子类，在.h文件中添加的UIImageView

#import <UIKit/UIKit.h>
@interface YourClassName : UIViewController{
    IBOutlet UIImageView *wallpaper;
}
@property (nonatomic, retain) IBOutlet UIImageView *wallpaper;
@end

然后.M你可以用你的方法

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [wallpaper setImage:[UIImage imageNamed: @"image.png"]];
}